He wore a formal suit to the wedding.
He never gets used to wearing formal shoes.
This message is suitable for a formal email.
We struggle with small talk in formal events.
I would like to file a formal complaint about this.
I hereby formally request that you investigate this matter.
Having a clear subject line in formal emails is extremely important.
I would like to formally complain about the quality of recent service.
The minimum I expect in this situation is a full refund and a formal apology.
I would like to file a formal complaint because I believe I have been treated unfairly.
Maintaining professional language and a courteous tone in formal communication is essential.